import { Tables, TableType, App, Database } from 'koishi-core';
declare module 'koishi-core' {
    interface Database {
        memory: MemoryDatabase;
    }
    namespace Database {
        interface Statics {
            'koishi-test-utils': typeof MemoryDatabase;
        }
    }
}
export interface MemoryConfig {
}
export interface MemoryDatabase extends Database {
}
interface TableConfig<O> {
    primary?: keyof O;
}
export declare class MemoryDatabase {
    app: App;
    config: MemoryConfig;
    $store: {
        [K in TableType]?: Tables[K][];
    };
    memory: this;
    static tables: {
        [K in TableType]?: TableConfig<Tables[K]>;
    };
    constructor(app: App, config: MemoryConfig);
    $table<K extends TableType>(table: K): any[];
    $count<K extends TableType>(table: K, field?: keyof Tables[K]): number;
}
export declare function apply(app: App, config?: MemoryConfig): void;
export {};